Inventor
HIRAYAMA YUSHI
JP31 patents
⚠️ This page may combine multiple inventors who share the name “HIRAYAMA YUSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
14 patentsUS7551862B2Jun 23, 2009
Developing device, and process unit and image forming apparatus using the developing device
RICOH KK29 citations93
US7616909B2Nov 10, 2009
Image forming apparatus and image forming method
RICOH KK21 citations92
US7260335B2Aug 21, 2007
Image-information detecting device and image forming apparatus
RICOH KK24 citations92
US7251420B2Jul 31, 2007
Method and apparatus for image forming capable of effectively detecting toner density
RICOH KK42 citations92
US7228081B2Jun 5, 2007
Method and apparatus for image forming capable of controlling image-forming process conditions
RICOH KK37 citations92
US7778560B2Aug 17, 2010
Image forming apparatus and method of adjusting charge bias
RICOH KK10 citations84
US7747182B2Jun 29, 2010
Image forming apparatus with toner density control
RICOH KK9 citations84
US7603046B2Oct 13, 2009
Image forming apparatus including toner supply controlling unit
RICOH KK11 citations84
US7548704B2Jun 16, 2009
Image forming apparatus effectively conducting a process control
RICOH KK8 citations84
US7536121B2May 19, 2009
Image forming apparatus and image density control method
RICOH KK16 citations84
US7493058B2Feb 17, 2009
Image forming apparatus and toner concentration controlling method
RICOH KK13 citations84
US7672602B2Mar 2, 2010
Developing unit and image forming apparatus which forces consumption of toner
RICOH KK7 citations74
US7668471B2Feb 23, 2010
Image forming apparatus and image forming method
RICOH KK5 citations63
US7809291B2Oct 5, 2010
Image forming apparatus with a two component developer, toner density detection and toner density correction
RICOH KK5 citations61
RICOH CO LTD
7 patentsUS8045874B2Oct 25, 2011
Image forming apparatus and image density control method
RICOH CO LTD9 citations84
US7881629B2Feb 1, 2011
Image forming apparatus and image density control method
RICOH CO LTD11 citations84
US8027605B2Sep 27, 2011
Image forming apparatus and image density control method
RICOH CO LTD2 citations63
US8009997B2Aug 30, 2011
Toner replenishment determination device of an image forming apparatus
RICOH CO LTD2 citations63
US7929873B2Apr 19, 2011
Image forming apparatus and image density control method
RICOH CO LTD5 citations61
US7885556B2Feb 8, 2011
Image forming apparatus for correcting a toner density target value
RICOH CO LTD1 citations52
US7903986B2Mar 8, 2011
Reuse method and a reusable device for an image forming apparatus having a first process linear velocity and a second image processing apparatus having a second process linear velocity
RICOH CO LTD0 citations42
HIRAYAMA YUSHI
4 patentsUS8311422B2Nov 13, 2012
Image forming apparatus having a first and second toner containers and a developing unit
HIRAYAMA YUSHI2 citations61
US8145100B2Mar 27, 2012
Process cartridge including developing unit and incorporated in image forming apparatus
HIRAYAMA YUSHI3 citations61
US8879963B2Nov 4, 2014
Toner supplying device and image forming apparatus using same
HIRAYAMA YUSHI2 citations60
US8818244B2Aug 26, 2014
Developing device and image forming apparatus
HIRAYAMA YUSHI0 citations39